On "Special Report with Bret Baier" on Fox News on Thursday, Krauthammer noted that Trump is leading a poll of presidential candidates that GOP primary voters would not vote for.

Trump has "a deserved 59 percent," Krauthammer said.

Host Bret Baier interrupted, asking, "Do you have to add 'deserved'?" Why yes, he did. Krauthammer added: "He is going to say how sad it is that I’m saying these things. But, you know, this is an open forum, and we have free speech. He has a well-deserved and, I would say, an impressive 59 percent.”

Game on.

Dummy political pundit @krauthammer constantly pressed the crazy war in Iraq. Many lives and trillions of dollars wasted. U.S. got NOTHING!

Trump is actually kind of famous (infamous?) for his Twitter attacks on journalists who dare to, you know, point out how ridiculous the things he says are. Here are a few more, plus what prompted them:

The offending incident: Also in April, National Review columnist and Fox commentator Jonah Goldberg went on Baier's show. That appears to be it. (Though in January, he did say, “I think Donald Trump is a bane of humanity.")

The offending incident: It's not all conservatives on the receiving end of Donald Trump's Twitter hate. Recently, The Fix's own Chris Cillizza has called Trump "irrelevant" and "Republicans' worst nightmare."

We'll end on a positive note of Trump's relationship with the news media. One fine day in April (a lot of these tweets happened within the span of a few days), MSNBC's liberal commentator Ed Schultz actually defended Trump. Trump, Schultz said, seems like someone "willing to work with the other side" and has an "unparalleled" business record in the GOP field.

Trump unleashes: Well, yes, Trump can work with the other side -- when they compliment him.